sbin/mrouted/vif.h

/*
 * The mrouted program is covered by the license in the accompanying file
 * named "LICENSE".  Use of the mrouted program represents acceptance of
 * the terms and conditions listed in that file.
 *
 * The mrouted program is COPYRIGHT 1989 by The Board of Trustees of
 * Leland Stanford Junior University.
 *
 *
 * $Id: vif.h,v 1.3 1993/05/30 01:36:38 deering Exp $
 */

/*
 * User level Virtual Interface structure
 *
 * A "virtual interface" is either a physical, multicast-capable interface
 * (called a "phyint") or a virtual point-to-point link (called a "tunnel").
 * (Note: all addresses, subnet numbers and masks are kept in NETWORK order.)
 */
struct uvif {
    u_short          uv_flags;      /* VIFF_ flags defined below            */
    u_char           uv_metric;     /* cost of this vif                     */
    u_char           uv_threshold;  /* min ttl required to forward on vif   */
    u_long           uv_lcl_addr;   /* local address of this vif            */
    u_long           uv_rmt_addr;   /* remote end-point addr (tunnels only) */
    u_long           uv_subnet;     /* subnet number         (phyints only) */
    u_long           uv_subnetmask; /* subnet mask           (phyints only) */
    u_long           uv_subnetbcast;/* subnet broadcast addr (phyints only) */
    char             uv_name[IFNAMSIZ]; /* interface name                   */
    struct listaddr *uv_groups;     /* list of local groups  (phyints only) */
    struct listaddr *uv_neighbors;  /* list of neighboring routers          */
};

#define VIFF_KERNEL_FLAGS       (VIFF_TUNNEL|VIFF_SRCRT)
#define VIFF_DOWN               0x0100         /* kernel state of interface */
#define VIFF_DISABLED           0x0200         /* administratively disabled */
#define VIFF_QUERIER            0x0400         /* I am the subnet's querier */


struct listaddr {
    struct listaddr *al_next;           /* link to next addr, MUST BE FIRST */
    u_long           al_addr;           /* local group or neighbor address  */
    u_long           al_timer;          /* for timing out group or neighbor */
};


#define NO_VIF          ((vifi_t)MAXVIFS)  /* An invalid vif index */